Unit description
Label
Display ProLink III FC
Pounds per cubic foot lb/ft3 lbs/ft3 lb/Cuft
Pounds per cubic inch lb/in3 lbs/in3 lb/CuIn
Degrees API API API degAPI
Short ton per cubic yard STon/yd3 sT/yd3 STon/Cuyd
(1) Non-standard calculation. This value represents line density divided by the density of water at 60 °F (15.6 °C).
4.5.2 Configure Density Damping
Display Menu > Configuration > Process Measurement > Density > Damping
ProLink III Device Tools > Configuration > Process Measurement > Density > Density Damping
Field Communicator Configure > Manual Setup > Measurements > Density > Density Damping
Density Damping controls the amount of damping that will be applied to density data.
Damping is used to smooth out small, rapid fluctuations in process measurement. The damping value
specifies the time period, in seconds, over which the transmitter will spread changes in the process variable.
At the end of the interval, the internal value of the process variable (the damped value) will reflect 63% of the
change in the actual measured value.
Procedure
Set Density Damping to the desired value.
• Default: 1.28 seconds
• Range: 0.0 to 60 seconds
Tip
• A high damping value makes the process variable appear smoother because the reported value changes
slowly.
• A low damping value makes the process variable appear more erratic because the reported value changes
more quickly.
• The combination of a high damping value and rapid, large changes in density can result in increased
measurement error.
• Whenever the damping value is non-zero, the damped value will lag the actual measurement because the
damped value is being averaged over time.
• In general, lower damping values are preferable because there is less chance of data loss, and less lag time
between the actual measurement and the damped value.
• If a number greater than 60 is entered, it is automatically changed to 60.
Configuration and Use Manual Configure process measurement
MMI-20025166 March 2019
Configuration and Use Manual 47
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